Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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+ Details

Fair Value Measurement - Additional Information (Detail) (USD $)	3 Months Ended
	Apr. 01, 2012	Mar. 31, 2013	Dec. 31, 2012
Fair Value Measurements [Line Items]
Carrying amount of long-term debt		$ 968,035,000	$ 965,280,000
Goodwill impairment	332,128,000
Contingent consideration		41,500,000
Current contingent consideration		21,900,000
Other liabilities		19,600,000
Minimum
Fair Value Measurements [Line Items]
Fair value of contingent consideration liability associated with future milestone		5,000,000
Maximum
Fair Value Measurements [Line Items]
Fair value of contingent consideration liability associated with future milestone		87,300,000
Significant Unobservable Inputs (Level 3)
Fair Value Measurements [Line Items]
Goodwill impairment	$ 332,000,000